Show pagesourceBack to top Share via Share via... Twitter LinkedIn Telegram Yammer RedditRecent ChangesSend via e-MailPrintPermalink × Table of Contents Making VMs faster on CoW file systems saving space with Windows 10 guest Troubleshooting E_ACCESSDENIED VirtualBox (Virtual Machines, VMs) see also: VirtualBox 🇩🇪 Making VMs faster on CoW file systems chattr -R +C ./VirtualBox VMs/ saving space with Windows 10 guest Sysinternals'sdelete -z C: VBoxManage modifyhd somedisk.vdi –compact if error "cannot register the hard disk … because a hard disk … with UUID … already exists": VBoxManage modifymedium disk {938781e0-65f5-46de-a656-8118cf761cdb} –compact Troubleshooting E_ACCESSDENIED .vbox File in the VM folder in VirtualBox VMs could be empty or inaccessible, maybe rename .vbox-prev file to .vbox to fix. Last modified: 2019-12-20 14:21